@article{MTMT:34762210, title = {Raman–Infrared Spectral Correlation of an Artificially Space-Weathered Carbonaceous Chondrite Meteorite}, url = {https://m2.mtmt.hu/api/publication/34762210}, author = {Gyollai, Ildikó and Biri, Sándor and Juhász, Zoltán and Király, Csilla and Rácz, Richárd Péter and Rezes, Dániel and Sulik, Béla and Szabó, Máté Zoltán and Szalai, Zoltán and Szávai, P and Szklenár, Tamás and Kereszturi, Ákos}, doi = {10.3390/min14030288}, journal-iso = {MINERALS-BASEL}, journal = {MINERALS}, volume = {14}, unique-id = {34762210}, abstract = {Raman and infrared measurements of the same locations were conducted on a northwest African (NWA) 10580 CO3 meteorite sample, before and after three proton irradiations (1 keV ion energy using 1011, 1014, and 1017 ion/cm2 fluent values), to simulate space weathering effects. In the case of Raman spectroscopy, both FWHM and peak positions of the major olivine and pyroxene bands changed after the irradiation, and the minor bands disappeared. In the FTIR spectra, the minor bands of olivine and pyroxene also disappeared; meanwhile, major IR bands of pyroxene remained visible, demonstrating both positive and negative peak shifts, and the olivines were characterised only by negative peak shifts. The olivines were characterised by negative FWHM changes for major bands, but positive FWHM changes for minor bands. The pyroxenes were characterised by elevated FWHM changes for minor bands after the irradiation. The disappearance of minor bands both of IR and Raman spectra indicates the amorphization of minerals. The negative peak shift in IR spectra indicates Mg loss for olivine and pyroxene, in agreement with the literature. The Raman spectra are characterised by positive peak shift and positive FWHM changes; the IR spectra are characterised by a negative peak shift. The Mg loss, which was detected by negative peak shifts of FTIR bands, may be caused by distortion of the crystal structure, which could be detected by a positive peak shift in Raman spectra. This joint observation and interpretation has not been formulated in the literature, but indicates further possibilities in the confirmation of mineral changes by different instruments. Shock alteration-based observations by other researchers could be used as a reference for irradiation experiments as irradiation makes a similar structural alteration, like a low-grade shock metamorphism.}, year = {2024}, eissn = {2075-163X}, orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Rezes, Dániel/0000-0003-0730-2418; Szalai, Zoltán/0000-0001-5267-411X} } @article{MTMT:34499100, title = {Irradiation induced mineral changes of NWA10580 meteorite determined by infrared analysis}, url = {https://m2.mtmt.hu/api/publication/34499100}, author = {Gyollai, Ildikó and Biri, Sándor and Juhász, Zoltán and Király, Csilla and Pal, B.D. and Rácz, Richárd Péter and Rezes, Dániel and Sulik, Béla and Szabó, Máté Zoltán and Szalai, Zoltán and Szavai, P. and Szklenár, Tamás and Kereszturi, Ákos}, doi = {10.1051/0004-6361/202347467}, journal-iso = {ASTRON ASTROPHYS}, journal = {ASTRONOMY & ASTROPHYSICS}, volume = {683}, unique-id = {34499100}, issn = {0004-6361}, abstract = {Identifying minerals on asteroid surfaces is difficult as space weathering modifies the minerals' infrared spectra. This should be better understood for proper interpretation. We simulated the space weathering effects on a meteorite and recorded the alterations of the crystalline structure, such as the change in peak positions and full width at half maximum values. We used proton irradiation to simulate the effects of solar wind on a sample of NWA 10580 CO3 chondrite meteorites. After irradiation in three gradually increased steps with 1 keV ion energy, we used infrared microscopic reflectance and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to identify and understand the consequences of irradiation. We find negative peak shifts after the first and second irradiations at pyroxene and feldspar minerals, similarly to the literature, and this shift was attributed to Mg loss. However, after the third irradiation a positive change in values in wavenumber emerged for silicates, which could come from the distortion of SiO tetrahedra, resembling shock deformation. The full width at half maximum values of major bands show a positive (increasing) trend after irradiations in the case of feldspars, using IR reflection measurements. Comparing DRIFTS and reflection infrared data, the peak positions of major mineral bands were at similar wavenumbers, but differences can be observed in minor bands . We measured the spectral changes of meteorite minerals after high doses of proton irradiation for several minerals. We show the first of these measurements for feldspars; previous works only presented pyroxene, olivine, and phyllosilicates.}, year = {2024}, eissn = {1432-0746}, orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Rezes, Dániel/0000-0003-0730-2418; Szalai, Zoltán/0000-0001-5267-411X} } @article{MTMT:34485871, title = {A Comet Interceptor küldetés}, url = {https://m2.mtmt.hu/api/publication/34485871}, author = {Kereszturi, Ákos}, journal-iso = {FIZIKAI SZEMLE}, journal = {FIZIKAI SZEMLE}, volume = {73}, unique-id = {34485871}, issn = {0015-3257}, year = {2023}, pages = {245-248} } @CONFERENCE{MTMT:34450682, title = {Ejecta thickness prediction map for the Connecting Ridge Artemis landing site}, url = {https://m2.mtmt.hu/api/publication/34450682}, author = {Tomka, Richárd Krisztián and Kereszturi, Ákos}, booktitle = {Lunar Surface Science Workshop}, unique-id = {34450682}, year = {2023} } @article{MTMT:34450672, title = {Tectonic analysis of a newly identified putative cryovolcanic field on Europa}, url = {https://m2.mtmt.hu/api/publication/34450672}, author = {Bradák, Balázs and Kereszturi, Ákos and Gomez, Christopher}, doi = {10.1016/j.asr.2023.07.062}, journal-iso = {ADV SPACE RES}, journal = {ADVANCES IN SPACE RESEARCH}, volume = {72}, unique-id = {34450672}, issn = {0273-1177}, year = {2023}, eissn = {1879-1948}, pages = {4064-4073} } @article{MTMT:34450670, title = {Separation of quasi-continuous and periodic components of lineament formation at the Belus – Phoenix - Rhadamanthys Linea “triangle” on Europa}, url = {https://m2.mtmt.hu/api/publication/34450670}, author = {Bradák, Balázs and Kimura, Jun and Gomez, Christopher and Kereszturi, Ákos}, doi = {10.1016/j.icarus.2022.115367}, journal-iso = {ICARUS}, journal = {ICARUS}, volume = {391}, unique-id = {34450670}, issn = {0019-1035}, year = {2023}, eissn = {1090-2643} } @article{MTMT:34450666, title = {Sverdrup-Henson crater: A candidate location for the first lunar South Pole settlement}, url = {https://m2.mtmt.hu/api/publication/34450666}, author = {Leone, Giovanni and Ahrens, Caitlin and Korteniemi, Jarmo and Gasparri, Daniele and Kereszturi, Ákos and Martynov, Alexey and Schmidt, Gene Walter and Calabrese, Giuseppe and Joutsenvaara, Jari}, doi = {10.1016/j.isci.2023.107853}, journal-iso = {ISCIENCE}, journal = {ISCIENCE}, volume = {26}, unique-id = {34450666}, year = {2023}, eissn = {2589-0042}, orcid-numbers = {Leone, Giovanni/0000-0003-1479-9039} } @article{MTMT:34143227, title = {Investigating the porosity of Enceladus}, url = {https://m2.mtmt.hu/api/publication/34143227}, author = {Kisvárdai, Imre and Pál, Bernadett and Kereszturi, Ákos}, doi = {10.1093/mnras/stad2333}, journal-iso = {MON NOT R ASTRON SOC}, journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}, volume = {525}, unique-id = {34143227}, issn = {0035-8711}, year = {2023}, eissn = {1365-2966}, pages = {1246-1253} } @article{MTMT:33632051, title = {Multiple generation magmatic and hydrothermal processes in a Martian subvolcanic environment based on the analysis of Yamato‐000593 nakhlite meteorite}, url = {https://m2.mtmt.hu/api/publication/33632051}, author = {Gyollai, Ildikó and Chatzitheodoridis, E and Kereszturi, Ákos and Szabó, Máté Zoltán}, doi = {10.1111/maps.13950}, journal-iso = {METEORIT PLANET SCI}, journal = {METEORITICS & PLANETARY SCIENCE}, volume = {58}, unique-id = {33632051}, issn = {1086-9379}, year = {2023}, eissn = {1945-5100}, pages = {218-240}, orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196} } @article{MTMT:33525794, title = {Formation and shock impact history of the Csatalja ordinary chondrite}, url = {https://m2.mtmt.hu/api/publication/33525794}, author = {Gyollai, Ildikó and Kereszturi, Ákos and Chatzitheodoridis, E and Kereszty, Zs and Szabó, Máté Zoltán and Király, Csilla and Szalai, Zoltán}, doi = {10.1111/maps.13931}, journal-iso = {METEORIT PLANET SCI}, journal = {METEORITICS & PLANETARY SCIENCE}, volume = {58}, unique-id = {33525794}, issn = {1086-9379}, year = {2023}, eissn = {1945-5100}, pages = {2-24}, orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Szalai, Zoltán/0000-0001-5267-411X} }